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On Jun 20, 2010, at 5:40 PM, recent:[log in to unmask] wrote:

> 1) In the app "Flockers", how should I revise the code so that I can  
> change the colorful triangle to a png file which is provided by  
> myself?

No sweat.  Check out sim.portrayal.simple.ImagePortrayal2D.  You'd  
register that portrayal in the ContinuousPortrayal2D instead of the  
Flockers drawing themselves.  If this terminology is confusing, check  
out the MASON tutorials.  See MASON's tutorial 5 in particular.

> 2) In the app "Flockers", how should I revise the code so that I can  
> change the black background to a jpg file which is provided by myself?

Also straightforward.  Check out the docs/howto.html file, which has a  
number of items along these lines.

Sean